Unit 8 · Electricity and MagnetismNatural and Artificial Magnets
Words of This Topic
- Magnetism: the property of pulling materials such as iron, nickel and cobalt.
- Natural magnet: a body that has magnetism in it naturally.
- Lodestone: the iron mineral called magnetite, which is magnetic in nature itself.
- Crust: the outermost solid layer of the Earth, where lodestone is found.
- Artificial magnet: a magnet made by producing magnetism in a magnetic material.
- Permanent magnet: a magnet that keeps its magnetism for a long time.
- Temporary magnet: a magnet that shows magnetism only for a while.
- Electromagnet: a magnet made by using electric power.
- Coil: wire wound turn upon turn, which produces magnetism when current flows through it.
- Enamelled copper wire: copper wire covered with a thin coat of enamel, used for winding coils.